NSSC OpenIR  > 微波遥感部
基于综合孔径辐射计稀疏阵列非均匀采样图像的快速重建
孙逢林; 张升伟; 北京8701信箱
Department国家863计划微波遥感技术
Source Publication电子与信息学报
2013
Volume35Issue:4Pages:927-932
ISSN1009-5896
Language中文
Keyword稀疏阵列 非均匀快速傅里叶变换 最小最大准则 共轭梯度迭代算法
Abstract某些分时采样干涉式微波辐射计成像系统,通常采用稀疏阵列,如圆环稀疏阵列。由于天线阵列优化设计时天线排布位置受限以及天线物理尺寸等限制,具有非均匀空间频域采样的特点。传统的图像重构方法是将非均匀空间频域点插值到均匀的笛卡尔坐标下,补偿空间频率密度,再进行逆快速傅里叶变换。这些插值方法不可避免地会引入误差或者混叠,并且是以假设空间频域的光滑性为前提的,具有局限性。与传统的插值方法不同的是,该文采用最小最大优化准则,先假设图像,再进行共轭梯度迭代快速非均匀傅里叶变换匹配的算法,绕开了空间频域光滑的假设。模拟实验结果表明此算法能够更加快速精确地重建图像。
Other AbstractSome thinned array, such as circle thinned array, is used by synthetic aperture interferometric radiometer to realize time-shared sampling. The thinned array may take non-uniform sampling of spatial frequencies due to antenna array structure optimization, the limitation of affined area and the physical size of antenna elements as well. In some traditional image reconstruction methods, non-uniform spatial frequency samplings are usually inserted to uniform Cartesian coordinate. And the spatial frequency densities are compensated. However, as the spatial sampling intensity is assumed to be quite smooth, these methods still bring errors and blurring in spite of different interpolation functions. Moreover, iterative methods that adopted straight Fourier transform are time consuming as they applied to non-uniform spatial frequency samplings. In this paper, another fast interactive image reconstruction method is introduced. The kernel of this algorithm is min-max formulation. The specific procedure of this method is as follows: (1)initiating the image; (2)taking non-uniform fast Fourier transform; (3)operating iterative conjugate gradient matched algorithm. The numerical simulating experiments show that, as spatial frequency samplings density is not smooth, the image can be still reestablished fast and accurately.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/2065
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
孙逢林,张升伟,北京8701信箱. 基于综合孔径辐射计稀疏阵列非均匀采样图像的快速重建[J]. 电子与信息学报,2013,35(4):927-932.
APA 孙逢林,张升伟,&北京8701信箱.(2013).基于综合孔径辐射计稀疏阵列非均匀采样图像的快速重建.电子与信息学报,35(4),927-932.
MLA 孙逢林,et al."基于综合孔径辐射计稀疏阵列非均匀采样图像的快速重建".电子与信息学报 35.4(2013):927-932.
Files in This Item:
File Name/Size DocType Version Access License
2013354927.pdf(2556KB) 开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[孙逢林]'s Articles
[张升伟]'s Articles
[北京8701信箱]'s Articles
Baidu academic
Similar articles in Baidu academic
[孙逢林]'s Articles
[张升伟]'s Articles
[北京8701信箱]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[孙逢林]'s Articles
[张升伟]'s Articles
[北京8701信箱]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.